Checklist · Family Law

Drafting a Prenuptial Agreement: A Practical Checklist

Type
Checklist
Jurisdiction
National
Date
2024-01-11
Topic
Family Law

A prenuptial agreement is only worth what a judge says it is worth on the day it is challenged, which is why drafting one is an exercise in building an evidentiary record as much as in writing contract language. This checklist walks the drafting and execution of a premarital agreement from the first threshold question — is your state a Uniform Premarital Agreement Act state, a Uniform Premarital and Marital Agreements Act state, or a common-law state with its own gloss — through timing and the duress defense, full and fair financial disclosure and the asset schedules, independent counsel for both sides, and the boundary between what spouses may contract for (property, debt, spousal support, estate rights) and what they may not (child support and custody). It covers the operative drafting problems that actually break agreements: separate versus marital property, active and passive appreciation, closely held business interests and startup equity, intellectual property, sunset clauses and triggers, and the infidelity and lifestyle clauses that courts routinely refuse to enforce. It closes with choice of law and forum, execution formalities, a worked example of trigger math, a consolidated one-glance checklist, and the primary authority. Premarital agreement law is state-specific in its details, and there is no single nationwide rule on most of the questions in this document; confirm every rule against your own jurisdiction before you sign. This is the enforcement-focused companion to UpLaw's prenuptial agreement overview.

Drafting a Prenuptial Agreement: A Practical Checklist

Family Law > Marital Agreements | Published 11 January 2024 - Updated 3 July 2025 | UpLaw - uplaw.us

A prenuptial agreement is not a document. It is an evidentiary record that a document was fairly made. Draft the record, and the contract will hold; draft only the contract, and you have written a very expensive invitation to litigate.

Keywords: prenuptial agreement, premarital agreement, UPAA, UPMAA, financial disclosure, independent counsel, duress, unconscionability, second look, spousal support waiver, separate property, active appreciation, sunset clause, choice of law, elective share

How to Use This Checklist

Every enforceable prenuptial agreement is built twice. It is built once in the drafting — the definitions, the schedules, the operative covenants — and again in the process: who saw what, when, with which lawyer, and how much time passed before the pen touched the paper. When a premarital agreement is invalidated years later, it is almost never because the drafter used the wrong word for "separate property." It is because the disclosure was thin, the counsel was borrowed, or the agreement landed on the fiancée's lap the night before the rehearsal dinner.

The phases below run in order, and they are meant to be worked in order. Each phase opens with check items you can actually tick, and closes with a short "Why it matters, and the traps" section explaining the doctrine underneath and the failure mode that puts agreements in the reporters. A consolidated one-glance checklist near the end collects every item in one place for the file.

This checklist is the enforcement-focused companion to UpLaw's Prenuptial Agreements: An Overview of Enforceability and Drafting. Read that first for the doctrinal frame; use this to actually do the work. For the default regime the agreement is displacing — how property is divided, how support is calculated, how custody is decided when there is no agreement — see Divorce: A Comprehensive Guide to Dissolution, Property Division, Support, and Custody, and for the whole practice area in one map, The Family Law Toolkit.

A word on state law, and it is an important one. Premarital agreements are creatures of state law, and the variation is real and substantive. Roughly half the states have adopted some version of the Uniform Premarital Agreement Act (UPAA, 1983); a small number have moved to the Uniform Premarital and Marital Agreements Act (UPMAA, 2012), including Colorado and North Dakota; and a substantial group — Pennsylvania, New York, and Massachusetts among them — apply their own common-law or statutory frameworks. There is no nationwide rule on the timing of execution, on whether independent counsel is required, on whether a court takes a "second look" at fairness, or on what may be waived. Everything below teaches the framework and identifies the majority approach, uses representative states as examples, and flags where jurisdictions diverge. Confirm every rule against your own state's statute and case law before relying on it.

Our running example. Iris and Malcolm plan to marry in eleven months. Iris holds a 9% founder stake in Kestrel Loom, Inc., a Delaware C-corp that has raised a seed round and is worth, on paper, something between "nothing" and "a great deal." Malcolm teaches music at a public high school, carries $38,000 in student debt, and expects to inherit a lake cottage from his mother. Neither is trying to cheat the other. Both want the agreement to survive. We will follow them through every phase, and in Phase 8 we will do the arithmetic on the deal they actually strike.

Phase 1 — Confirm the governing standard

  • [ ] Identify the state whose law will govern (usually the state of domicile at execution, and the state where the parties will live).
  • [ ] Determine whether that state has adopted the UPAA, the UPMAA, or applies common law / a home-grown statute.
  • [ ] Pull the state's enforcement statute and read the defenses verbatim (e.g., Cal. Fam. Code §§ 1610–1617; N.Y. Dom. Rel. Law § 236(B)(3)).
  • [ ] Determine whether the state is a community property state (Arizona, California, Idaho, Louisiana, Nevada, New Mexico, Texas, Washington, Wisconsin) or an equitable distribution state — this is the default rule set the agreement is overriding.
  • [ ] Determine whether the state takes a "second look" at conscionability at the time of enforcement, or measures unconscionability only at execution.
  • [ ] Identify whether the state imposes special rules for spousal support waivers (a number of states do).
  • [ ] Identify whether the state imposes a statutory waiting period between presentation and signature.
  • [ ] Note any mandatory formalities: writing, signature, acknowledgment before a notary, witnesses.
  • [ ] Write a one-page governing-law memo to the file, and date it.

Why it matters, and the traps

The UPAA framework is the baseline in the largest group of states, so start there. Under UPAA § 2, a premarital agreement must be in writing and signed by both parties, and it is enforceable without consideration — the marriage itself supplies it. Under § 4, it becomes effective on marriage. The enforcement provision, § 6, is the one that matters: the agreement is unenforceable if the party resisting it proves either (a) that he or she did not execute it voluntarily, or (b) that the agreement was unconscionable when it was executed and, before execution, that party was not provided fair and reasonable disclosure of the other's property and financial obligations, did not voluntarily and expressly waive that disclosure in writing, and did not have (and could not reasonably have had) adequate knowledge of it.

Read that structure carefully, because it contains the single most important drafting insight in this document: under the UPAA, involuntariness alone kills the agreement, but unconscionability alone does not. Unconscionability is a defense only when it is paired with a disclosure failure. That is why disclosure is the load-bearing wall of the whole structure — and why states that have departed from the UPAA have mostly departed by making unfairness matter more, not less.

The UPMAA (2012) tightened things. It consolidates premarital and marital agreements into one act, and conditions enforceability on four requirements that the careful drafter should treat as a de facto best practice regardless of jurisdiction: the agreement was entered into voluntarily and without duress; the party had access to independent legal representation; if a party waived representation, the agreement contained a plain-language notice of the rights being given up; and the party received adequate financial disclosure. Only a handful of states have enacted it, so do not assume it applies — but drafting to it costs little and buys a great deal.

Then there are the common-law and home-grown-statute states, and they diverge sharply from each other. Pennsylvania is the strictest contractarian jurisdiction: in Simeone v. Simeone, 581 A.2d 162 (Pa. 1990), the Pennsylvania Supreme Court swept away paternalistic review, held that prenuptial agreements are contracts to be enforced like any other, and declined to inquire into the reasonableness of the bargain — while retaining a full-and-fair-disclosure requirement. California moved in the opposite direction after In re Marriage of Bonds, 5 P.3d 815 (Cal. 2000), in which the court upheld an agreement signed by a party who had no independent counsel; the legislature responded by amending the Family Code (effective 2002) to add hard procedural rules, including the seven-day rule discussed in Phase 2 and the rule that a spousal-support waiver is unenforceable if the waiving party was not represented by independent counsel at the time of signing (Cal. Fam. Code § 1612(c)).

The second-look trap. A minority of states will ask not only whether the agreement was fair when signed but whether it is conscionable at the time of divorce. Massachusetts is the leading example — DeMatteo v. DeMatteo, 436 Mass. 18, 762 N.E.2d 797 (2002), requires that the agreement be fair and reasonable at execution and that it not be unconscionable at the time of enforcement. Connecticut reaches a similar place by statute: Conn. Gen. Stat. § 46b-36g makes an agreement unenforceable if it was unconscionable when executed or when enforcement is sought. New Jersey went the other way, amending N.J. Stat. Ann. § 37:2-38 in 2013 to fix unconscionability at the time of execution. Two neighboring states, two opposite answers to the same question — which is exactly why the governing-law memo comes first. If you are drafting in a second-look state, you are drafting for a court that will read the document twenty years from now with a straight face, and a clause that strands a spouse who gave up a career to raise children will not survive that reading.

Iris and Malcolm live in a UPAA state that also applies a conscionability check at enforcement. Their counsel's first memo is one page long: here is the statute, here are the two defenses, here is what we must be able to prove.

Phase 2 — Timing: start early and defeat the duress argument

  • [ ] Begin the process no later than 90 days before the wedding; six months is better.
  • [ ] Deliver the first full draft — with schedules — a minimum of 30 days before signing, and target signature at least 30 days before the wedding.
  • [ ] Where a statutory waiting period applies, satisfy it: Cal. Fam. Code § 1615(c) requires at least seven calendar days between the day the party is first presented with the agreement and advised to seek independent counsel and the day it is signed.
  • [ ] Document each transmission (email with attachment, cover letter, delivery receipt).
  • [ ] Do not condition the wedding on signature — not in writing, not in email, not in front of witnesses. Ever.
  • [ ] Avoid signing at the venue, on the wedding weekend, or in the presence of family exerting pressure.
  • [ ] Build a written timeline exhibit as you go: date first raised, date of first draft, dates of each redline, date counsel retained, date signed.
  • [ ] If the final version changes materially from what was presented, restart the clock rather than argue about materiality later.

Why it matters, and the traps

Voluntariness is where prenups die. The claim is always some version of "He handed it to me two days before the wedding, my parents had already flown in, and he said there would be no wedding without it." Courts vary on whether that states duress. Under the general contract framework of Restatement (Second) of Contracts §§ 175–176, duress requires an improper threat that leaves the victim no reasonable alternative, and many courts have held that a threat not to marry is not "improper," since one is always free not to marry. But the calculus changes when the threat is delivered on a clock the drafting party controls. Time pressure is the multiplier that turns every other weakness — thin disclosure, no counsel, a lopsided deal — into an involuntariness finding.

Bonds is instructive precisely because it came out the other way: the California Supreme Court found the agreement voluntary on the totality of the circumstances even though the challenging spouse had no independent lawyer and limited English. The legislature's reaction — codifying the seven-day rule and the independent-counsel requirement for support waivers — tells you what the profession concluded about that outcome. Treat Bonds as a warning label, not a permission slip.

The trap that gets missed: California's seven-day clock runs from presentation of the agreement and the advisement to seek counsel — not from the last redline. Prudent counsel restarts the clock whenever the final version differs materially from what was presented. Do not litigate for two years over whether a change was "material" when a one-week delay would have mooted the question. And note that most states have no waiting period at all; the absence of a statutory clock is not permission to move fast, because voluntariness is still judged on the totality of the circumstances everywhere.

Iris and Malcolm start eleven months out. Iris's counsel sends the first draft with a cover letter, in writing, that says: "Malcolm should retain his own lawyer. Iris will pay for it. This agreement is not a condition of the marriage, and Iris will marry Malcolm whether or not he signs it." That single sentence, produced years later, is worth more than any clause in the document.

Phase 3 — Full and fair financial disclosure and the asset schedules

  • [ ] Prepare a Schedule A (Party 1's assets, liabilities, and income) and Schedule B (Party 2's) as exhibits incorporated by reference.
  • [ ] List every asset by category with a good-faith value and a stated basis for it: real property, bank and brokerage accounts, retirement plans (with plan name and approximate balance), business interests, restricted stock, options, RSUs, SAFEs and convertible notes, life insurance cash value, vehicles, art, crypto, receivables, trust interests (including contingent and discretionary interests), and expected inheritances if known.
  • [ ] List every liability: mortgages, student loans, credit cards, guarantees, tax liabilities, judgments, contingent obligations.
  • [ ] Attach backup: two to three years of tax returns, recent account statements, a capitalization summary for private company equity, and a valuation or the stated basis for the value.
  • [ ] Have both parties initial every page of both schedules.
  • [ ] Include a recital in which each party acknowledges receipt, review, and understanding of the other's schedule, and an opportunity to ask questions and demand more.
  • [ ] If a party truly waives further disclosure, do it in a separate, express, written waiver that states what is being waived — but understand that this is the weakest link in the document.
  • [ ] Never round a number down to make an asset look small.

Why it matters, and the traps

Disclosure is the one requirement that appears in every framework — UPAA, UPMAA, Simeone, and every common-law variant. It is also the one the wealthier party is most tempted to shortcut, because the schedule is where the leverage becomes visible.

The standard in most states is fair and reasonable disclosure, not perfect disclosure. A schedule need not be a forensic audit. But it must give the other party a genuine picture of what he or she is agreeing to forgo. A schedule that says "Business interest: value unknown" for an asset the owner privately values in eight figures is not disclosure; it is a trap, and a court will treat it as one. Where a value is genuinely uncertain — as with early-stage startup equity — say so and give the inputs: the number of shares, the fully diluted percentage, the last preferred round price, the most recent 409A valuation, the resulting notional range. Let the other party's lawyer draw the conclusion.

The waiver trap. Disclosure waivers are permitted under the UPAA (§ 6(a)(2)(ii)) and are almost always a mistake. A waiver signed by a party who had no independent counsel, in a state that takes a second look, in an agreement that is lopsided, is precisely the fact pattern in which prenups are set aside. If the other side offers to waive disclosure, decline the offer and disclose anyway. You are not being generous; you are buying enforceability.

Iris's Schedule A lists Kestrel Loom as follows: 4,500,000 shares of common stock, 9.0% fully diluted, subject to a four-year vesting schedule with 14 months elapsed; last preferred round priced at $1.10 per share, implying a notional common value of roughly $4.95M before illiquidity and liquidation-preference discounts; most recent 409A common valuation of $0.21 per share, implying roughly $945,000. She attaches the capitalization summary, the stock purchase agreement, and her 83(b) election filing. She discloses both numbers and the spread between them. Malcolm's lawyer now knows exactly what is on the table. So does the judge, in 2039.

Phase 4 — Independent counsel for both parties

  • [ ] Retain separate counsel for each party. One lawyer cannot represent both.
  • [ ] Advise the other party in writing to obtain independent counsel, and preserve that writing.
  • [ ] Consider having the wealthier party pay the other's reasonable legal fees — and say so in the agreement.
  • [ ] Give the other party's counsel real time to review and negotiate, and accept at least some redlines.
  • [ ] If a party insists on proceeding unrepresented, include a plain-language waiver of representation that identifies the specific rights being surrendered (community property or equitable distribution rights, spousal support, elective share, homestead, family allowance) — and understand that it may not save you.
  • [ ] Confirm your state's rule: a spousal-support waiver may be unenforceable without independent counsel (Cal. Fam. Code § 1612(c)).
  • [ ] Have each lawyer sign a certificate of independent review appended to the agreement.

Why it matters, and the traps

Independent counsel is the closest thing premarital-agreement law has to a safe harbor. It does not guarantee enforcement, but its absence is the fact that appears in nearly every set-aside opinion. The UPMAA elevates "access to independent legal representation" to an express enforceability condition. California makes it dispositive for support waivers. Even in Simeone's hard-nosed Pennsylvania, the presence of a lawyer on the other side is what makes the contractarian rule palatable.

The traps:

  • Borrowed counsel. The fiancé's corporate lawyer, his college roommate, or a lawyer the drafting party selected and paid without disclosure is not independent counsel. Let the other party choose. Pay the bill without controlling the lawyer.
  • The nine-minute review. A lawyer who receives the document on the day of signing has not provided meaningful representation, and a court knows it.
  • The unrebutted redline. If the other side's counsel proposes changes and nothing is accepted, the record shows a take-it-or-leave-it instrument. Give real concessions; they are cheaper than litigation.
  • Waiver of counsel. Permitted in most states, catastrophic in most states. Under the UPMAA, if a party waives representation the agreement must contain a conspicuous, plain-language notice of the rights being waived. Draft that notice as if the judge is the audience — because she is.

Iris pays for Malcolm's lawyer, who is a family-law specialist Malcolm found himself. Iris's counsel never speaks to her about who that lawyer should be. The engagement letter is in the file.

Phase 5 — What you may contract for

  • [ ] Property characterization: what is separate, what is marital or community, and how each is treated on divorce and on death.
  • [ ] Debt: allocation of premarital debt, debt incurred during marriage, and joint obligations. (Malcolm's $38,000 in student loans stays Malcolm's.)
  • [ ] Income and appreciation: whether earnings during marriage are separate or marital; how appreciation of separate property is treated.
  • [ ] Spousal support / alimony: waiver, cap, formula, or tiered schedule by years of marriage — subject to the public-assistance override and to your state's rules on support waivers.
  • [ ] Estate rights: waiver of the elective share, homestead allowance, exempt property, and family allowance (UPC § 2-213 permits waiver by written contract before or after marriage in states that have adopted it).
  • [ ] Life insurance obligations, and beneficiary designations the parties agree to maintain.
  • [ ] Management of assets during the marriage; the right to make gifts, sell, or encumber.
  • [ ] Business interests: control, buy-sell coordination, valuation methodology.
  • [ ] Attorney's fees in an action to enforce.
  • [ ] Confidentiality of the agreement and of the schedules.
  • [ ] Dispute resolution: mediation and/or arbitration of disputes arising under the agreement, to the extent your state permits.

Why it matters, and the traps

UPAA § 3 gives an expansive list of permitted subject matter: the rights and obligations in any property; the right to buy, sell, lease, or transfer; disposition on separation, divorce, or death; modification or elimination of spousal support; the making of a will or trust to carry out the agreement; ownership rights in life insurance death benefits; choice of law; and "any other matter, including their personal rights and obligations, not in violation of public policy." That last clause is the doorway — and the limit.

The two traps in this phase are the ones nobody sees coming.

First, the public-assistance override. Under UPAA § 6(b), if a modification or elimination of spousal support causes one party to be eligible for public assistance at separation or divorce, a court may order support to the extent necessary to avoid that eligibility — notwithstanding the agreement. You cannot contract a spouse onto the welfare rolls. Draft the support provision with a floor that keeps that override from ever being triggered, and remember that several states go considerably further than the UPAA floor.

Second, ERISA. A premarital agreement cannot waive a spouse's rights in a qualified retirement plan. ERISA § 205 (29 U.S.C. § 1055) requires spousal consent to waive a qualified joint and survivor annuity or a qualified preretirement survivor annuity, and that consent must be given by a spouse. A person who is not yet married is not a spouse, and the Treasury regulations under the parallel Code provisions say so directly (see 26 C.F.R. § 1.401(a)-20, Q&A-28, providing that an agreement entered into prior to marriage does not satisfy the consent requirements). The fix: covenant in the prenup that each party will execute the required spousal consent after the marriage, on the plan's own forms, and treat the failure to do so as a breach with an equitable remedy — specific performance, a constructive trust, or a damages claim measured as in Contract Damages: How Courts Make the Injured Party Whole. IRAs are different (they are not subject to § 205's consent regime and are governed largely by state property law and beneficiary designation), but do not guess — check the account type and the plan document.

Phase 6 — What you may NOT contract for

  • [ ] Do not waive, cap, or predetermine child support. UPAA § 3(b): "The right of a child to support may not be adversely affected by a premarital agreement."
  • [ ] Do not predetermine child custody, parenting time, or decision-making. Custody is governed by the best-interests standard and remains subject to the court's continuing jurisdiction.
  • [ ] Do not include terms that are unconscionable at execution (or, in second-look states, at enforcement).
  • [ ] Do not include provisions that incentivize divorce or purport to make divorce a condition of a benefit.
  • [ ] Do not attempt to bind a court on the religious upbringing of children, or to have a civil court adjudicate religious questions.
  • [ ] Do not waive the right to seek temporary support or fees in a dissolution action if your state prohibits that waiver.
  • [ ] Do not include a provision purporting to waive a spouse's ERISA-plan survivor rights (see Phase 5).
  • [ ] Include a severability clause so that an unenforceable term does not take the agreement down with it.

Why it matters, and the traps

There are two categories here and they fail differently. Child-related terms are void as against public policy — they are outside the parties' power to contract, because the right belongs to the child and the parens patriae jurisdiction belongs to the court. You may recite an intention regarding education savings; you cannot bind the court, and you cannot bargain away a child's support. Unconscionable terms, by contrast, are subject to judicial evaluation under a standard drawn from ordinary contract law — Restatement (Second) of Contracts § 208 — as informed by the marital context and by whatever gloss your state has put on it.

The severability trap. A prenup that includes a child-support waiver has done two bad things. It has included a void clause, and — more dangerously — it has told the judge, on page one, that the drafter was willing to overreach. Judges read agreements holistically. An obviously unenforceable clause colors the reading of every clause near it. Strike it in drafting rather than relying on severability in litigation.

Phase 7 — Drafting the operative terms

  • [ ] Define Separate Property and Marital Property precisely, and provide that the definitions govern notwithstanding contrary state default rules.
  • [ ] Address tracing: how separate property retains its character when converted, reinvested, or deposited; whether commingling transmutes.
  • [ ] Address appreciation explicitly, distinguishing passive appreciation (market growth) from active appreciation (attributable to a spouse's efforts during the marriage). Say which is separate and which is marital. Do not leave it to the court.
  • [ ] Address the marital residence — often the single term most worth negotiating away from the default.
  • [ ] For business interests: state that the entity, its equity, and all proceeds remain separate; that the non-owner spouse acquires no equitable interest, no goodwill claim, and no right to compel a valuation; and fix a valuation methodology if any value is to be shared.
  • [ ] For startup equity: address unvested shares, options, RSUs, SAFEs, convertible notes, secondary sales, acquisition consideration, and earnouts by name. Address whether vesting during the marriage creates a marital component.
  • [ ] For intellectual property: address ownership of copyrights, patents, trademarks, and rights of publicity created before and during the marriage, and the royalty streams from each.
  • [ ] Address gifts and inheritances received during the marriage (Malcolm's lake cottage).
  • [ ] Address transmutation: require a signed writing to convert separate property to marital property (cf. Cal. Fam. Code § 852), and prohibit transmutation by conduct, commingling, or titling.
  • [ ] Include a reimbursement provision for separate funds contributed to marital assets.
  • [ ] Include integration, amendment only in a signed writing, severability, and no-waiver-by-conduct clauses.
  • [ ] Coordinate the confidentiality clause with any NDA or company confidentiality obligations that touch the disclosed materials — see Building an Enforceable NDA Clause by Clause: A Practical Checklist.

Why it matters, and the traps

This is where the money is, and where most agreements are quietly defective. The recurring failure is a document that says "each party's separate property shall remain separate" and stops — leaving the hardest question, what happened to that property during twenty years of marriage, entirely to the default law the agreement was supposed to displace.

Active appreciation is the sleeper issue. In many equitable-distribution states, and in several community-property states through reimbursement or apportionment doctrines, the increase in value of separate property attributable to a spouse's labor during the marriage is at least partly marital. The specific doctrine and its label differ by state, and this is one of the areas where you must read your own case law rather than assume. Iris's 9% of Kestrel Loom was separate at the altar. If she then spends the next nine years as CEO, drawing a below-market salary while the company grows, a court applying default law in many states will find a substantial marital component in that appreciation — because the growth was bought with marital effort. If Iris's agreement does not confront this, her prenup has protected almost nothing that matters.

The fix is to say so directly: all appreciation in the Kestrel Loom interest, whether passive or active, and whether or not attributable to either party's efforts, shall remain the separate property of Iris — coupled, if the deal needs balance, with an explicit offsetting benefit to Malcolm (a fixed percentage of the appreciation, a lump-sum schedule tied to years of marriage, a life insurance obligation, or a share of any liquidity event above a threshold). The point is that the trade is visible, negotiated, and on the record.

IP is its own animal. Copyrights, patents, and rights of publicity generate income streams that can outlive the marriage by decades, and their treatment on divorce and at death is genuinely unsettled in many states. If either party is a creator, coordinate the prenup with the analysis in Passing Down Your IP: Copyright, Patents, Publicity Rights, and Estate Planning, and note that the copyright termination right under 17 U.S.C. §§ 203 and 304(c) vests in a statutory class of successors and cannot be contracted away in advance.

Coordinate with the corporate documents. A prenup that says the equity is separate, sitting next to a stockholders' agreement with a transfer restriction and a company that will one day be diligenced, is a set of moving parts that must line up. Investors and acquirers do ask about marital consents; see Getting Diligence-Ready Before You Raise: A Comprehensive Guide for Founders and The Startup Legal Document Stack: What Founders Need and Why. If Iris holds SAFEs, read Simple Agreements for Future Equity: An Overview of How SAFEs Actually Work and describe the instrument by name and by its conversion mechanics in the agreement, rather than lumping it into "securities."

Phase 8 — Sunset clauses, triggers, and lifestyle clauses

  • [ ] Decide whether to include a sunset clause (the agreement expires, or its protections step down, after N years of marriage).
  • [ ] Consider step-downs instead of a cliff: a support formula or property share that increases with each year of marriage.
  • [ ] Consider child-birth triggers: a provision that increases the non-owner spouse's entitlement if a child is born, or if a spouse leaves or reduces workforce participation.
  • [ ] Consider a liquidity-event trigger: a defined share to the non-owner spouse if the business is sold above a threshold.
  • [ ] Draft triggers with objective, verifiable conditions and unambiguous math. Attach a worked example as an exhibit.
  • [ ] Think hard before including an infidelity, weight, in-law, or lifestyle clause. Most are unenforceable and all of them are damaging in front of a judge.
  • [ ] Do not include a liquidated damages provision keyed to marital misconduct.

Why it matters, and the traps

A sunset clause is the single most effective enforceability device available to the wealthier party, and it is chronically underused. A prenup that is genuinely fair at execution can become brutally unfair at year 25, and in a second-look state that is precisely when a court will refuse to enforce it. A sunset, a step-down, or a birth-of-a-child trigger inoculates the agreement against that argument by building the fairness adjustment into the document — which is exactly what a judge would otherwise do by hand, less predictably, and with the benefit of hindsight you do not have.

Lifestyle clauses. Infidelity penalties, weight clauses, in-law-visit clauses, and social-media clauses are a staple of tabloid coverage and a liability in real litigation. In Diosdado v. Diosdado, 97 Cal. App. 4th 470 (Cal. Ct. App. 2002), the California Court of Appeal held a marital agreement imposing liquidated damages for sexual infidelity unenforceable as contrary to the public policy underlying no-fault divorce: the state has removed fault from the dissolution calculus, and the parties cannot contract it back in. Not every state has ruled on the question, and outcomes elsewhere are not uniform — but the direction of travel is clear, and the collateral damage is worse than the clause is worth. A judge who reads a weight clause on page 14 will read pages 1 through 13 differently.

Worked example: doing the trigger math

Iris and Malcolm land here. Their agreement keeps the Kestrel Loom stake — and all appreciation in it, active or passive — as Iris's separate property, and buys that protection with three explicit, objective triggers:

  1. Liquidity-event participation. If Kestrel Loom is sold or goes public while the parties are married, Malcolm receives 15% of Iris's net proceeds above a $2,000,000 threshold. "Net proceeds" is defined in the agreement as gross consideration actually received by Iris, less (a) her exercise costs, (b) taxes actually paid on the consideration, and (c) amounts held in escrow or subject to an earnout until and unless actually received.
  2. Child / career-sacrifice step-up. If a child of the marriage is born and Malcolm reduces to part-time employment or leaves the workforce for at least twelve consecutive months, the 15% becomes 25%.
  3. Marital-duration step-down of the property protection. The separate-property characterization of the Kestrel Loom stake steps down beginning at year 15, converting 2% of the then-value to marital property for each additional year of marriage.

Now run the numbers. Suppose Kestrel Loom is acquired in year nine of the marriage. Iris's gross consideration is $18,000,000, of which $3,000,000 sits in an 18-month indemnity escrow. She pays $5,600,000 in taxes on the amount actually received.

  • Gross received at closing: $18,000,000 − $3,000,000 (escrow) = $15,000,000
  • Less taxes actually paid: $15,000,000 − $5,600,000 = $9,400,000 net
  • Less the threshold: $9,400,000 − $2,000,000 = $7,400,000 participating base
  • A child was born in year four and Malcolm went part-time for two years, so the 25% tier applies: $7,400,000 × 25% = $1,850,000 to Malcolm
  • The escrow releases in full 18 months later. That $3,000,000 is then "actually received." Taxes on it are $1,120,000, leaving $1,880,000 net. The threshold is already exhausted, so Malcolm receives $1,880,000 × 25% = $470,000, payable within 30 days of release.

Total to Malcolm: $2,320,000. Iris keeps the rest, free of any claim to goodwill, active appreciation, or the entity itself.

That is what a well-drafted trigger looks like: every input is defined, every operation is stated in order, the escrow and tax treatment are addressed rather than assumed, and the exhibit shows the arithmetic so that no one has to reconstruct the parties' intent from adjectives. Malcolm's lawyer negotiated all three triggers, and the redlines proving it sit in the file. That negotiation is the best evidence of voluntariness the file will ever contain. The agreement contains no lifestyle clauses at all.

Phase 9 — Choice of law and forum

  • [ ] Include an express choice-of-law clause. UPAA § 3(a)(7) expressly authorizes it.
  • [ ] Choose a state with a substantial relationship to the parties or the transaction — domicile, place of execution, location of the assets, intended marital home. A choice of law with no nexus invites invalidation under the principles of Restatement (Second) of Conflict of Laws § 187.
  • [ ] Recognize that a court will generally not apply chosen law that offends the fundamental public policy of a state with a materially greater interest — and that the child-support and custody limits, and the public-assistance override, are exactly such policies.
  • [ ] Consider a forum selection clause, and understand its limits: a dissolution action is filed where jurisdictional and residency requirements are met, and no clause can change that.
  • [ ] Consider mediation or arbitration of disputes under the agreement (valuation, characterization, interpretation) even if the dissolution itself is judicial — where your state permits it.
  • [ ] Add a mobility clause: the parties agree the agreement remains effective if they relocate, and covenant to execute confirming documents if a new state's law requires them.

Why it matters, and the traps

The choice-of-law clause is the most over-trusted provision in the document. A prenup executed in Pennsylvania under Simeone's permissive standard, with a Pennsylvania choice-of-law clause, will not automatically be enforced by a Massachusetts court fifteen years later if the couple has lived in Massachusetts for a decade, the children are there, and the agreement is unconscionable at enforcement. The forum's own public policy will assert itself, and the second-look doctrine of DeMatteo is exactly the kind of policy that does.

The practical lesson: draft to the strictest plausible standard, not to the friendliest one. If you satisfy the UPMAA's four conditions — voluntariness, access to independent counsel, plain-language notice of waived rights, adequate disclosure — and add a genuine fairness safety valve of the kind built in Phase 8, the agreement travels. If your agreement depends on being litigated in one particular county, it does not.

For the arbitration piece, see Drafting an Arbitration Clause: A Practical Checklist and Choosing a Dispute-Resolution Forum: Litigation, Arbitration, and Mediation Compared, and confirm that your state permits arbitration of the specific issues you intend to send there. States vary considerably: many permit arbitration of property and support questions arising under a marital agreement; few if any permit binding, unreviewable arbitration of child custody.

Phase 10 — Execution formalities and the evidentiary record

  • [ ] Writing, signed by both parties. (UPAA § 2; no consideration required beyond the marriage.)
  • [ ] Comply with any state acknowledgment requirement — New York, for example, requires the agreement to be acknowledged in the manner required to entitle a deed to be recorded (N.Y. Dom. Rel. Law § 236(B)(3)), and New York courts have refused to enforce prenups over defective acknowledgment.
  • [ ] Use a notary (and witnesses, if your state requires them or your caution suggests them) even where not strictly required.
  • [ ] Have both parties initial every page, including the schedules.
  • [ ] Sign well before the wedding — never at the venue, never on the wedding weekend.
  • [ ] Sign in counterparts only if the agreement permits it; a single, wet-ink, fully executed original is safer.
  • [ ] Consider video-recording the signing, with each party stating on camera that they have read the agreement, had counsel, received disclosure, and are signing voluntarily. (Get consent to record; some states require all-party consent.)
  • [ ] Have each party's counsel execute a certificate of independent review.
  • [ ] Retain a complete file: engagement letters, the advisement-to-obtain-counsel letter, every draft and redline with dates, the disclosure schedules and backup, correspondence, and the signing timeline.
  • [ ] Store executed originals safely; give each party a full conformed copy with the schedules.
  • [ ] Post-marriage: execute the ERISA spousal consents, update beneficiary designations, and conform the estate plan.
  • [ ] Calendar a review every 3–5 years and at each major life event (child, liquidity event, relocation to a new state).

Why it matters, and the traps

If you take one thing from this checklist, take this: the file is the agreement. When the challenge comes — and if there is real money, it will come — the fight is about process, and the party with the contemporaneous record wins it. A dated cover letter advising the other party to retain counsel; a redline showing the other side's lawyer extracted real concessions; a signing date four months before the wedding; an initialed schedule with a capitalization summary attached. Those documents are unglamorous and they are dispositive.

Post-marriage follow-through is the most commonly skipped step in this entire document. A prenup that says "Malcolm waives all rights in Iris's 401(k)" does exactly nothing until Malcolm, as a spouse, signs the plan's consent form. Likewise, a prenup that waives elective-share rights (UPC § 2-213 in adopting states) should be backstopped by an actual estate plan that does what the prenup contemplates, and by an estate administration that knows the waiver exists. Coordinate with Drafting a Will: A Practical Checklist, Wills, Trusts, and Probate: A Comprehensive Estate Planning Guide, and — for the fiduciary who will one day have to apply the waiver — Administering an Estate: A Probate Checklist. For asset-protection layering beyond the prenup itself, see Domestic and Offshore Asset Protection Compared: A Wealth-Defense Field Guide, and for the broader estate-planning map, The Estate Planning and Wealth Transfer Toolkit.

Common Mistakes to Avoid

  1. Starting too late. The single most common defect. Everything else about the agreement can be excellent and a rushed signing will still sink it.
  2. Thin disclosure. "Business interest: value unknown." Disclose the inputs even when the value is genuinely uncertain.
  3. Letting the other side go unrepresented. It is a false economy, and in California it is fatal to a support waiver (Cal. Fam. Code § 1612(c)).
  4. The one-lawyer prenup. A single lawyer cannot ethically represent both parties. Not with a conflict waiver, not "just to paper it."
  5. Ignoring active appreciation. Freezing the value of a business at the wedding day, without addressing growth attributable to marital effort, protects a snapshot and gives away the movie.
  6. Assuming the prenup waives ERISA plan rights. It cannot. Execute the plan's spousal consent after the marriage.
  7. Attempting to bind child support or custody. Void, and it poisons the court's reading of everything else.
  8. Lifestyle and infidelity clauses. Frequently unenforceable (see Diosdado), always damaging.
  9. No sunset, no step-down, no trigger. An agreement that is identical at year 1 and year 30 is an agreement asking to be reformed by a judge in a second-look state.
  10. Relying on a choice-of-law clause to escape the forum's public policy. Draft to the strictest plausible standard instead.
  11. Vague trigger math. "A fair share of any sale" is not a term; it is a lawsuit. Define the inputs and attach the arithmetic.
  12. Forgetting the schedules. Executed agreements are found, years later, with the schedules missing. Initial every page and give each party a complete conformed copy.
  13. Never revisiting it. A prenup written for two 29-year-olds with no children is not the same document when they are 47 with three children and a sold company.
  14. Missing state formalities. New York's acknowledgment requirement has defeated otherwise valid agreements. Read your statute.
  15. Treating it as a hostile act. A prenup negotiated openly, with real concessions, produces both a better marriage conversation and a far more enforceable document.

The Consolidated Checklist

Threshold

  • [ ] Governing state identified; UPAA / UPMAA / common law determined
  • [ ] Enforcement statute and defenses read verbatim
  • [ ] Community property vs equitable distribution default understood
  • [ ] Second-look state? Yes / No
  • [ ] Special rules for support waivers identified
  • [ ] Statutory waiting period, if any, identified

Process

  • [ ] Started ≥ 90 days (ideally 6 months) before the wedding
  • [ ] Written advisement to the other party to retain independent counsel
  • [ ] Independent counsel retained by both parties; fees addressed
  • [ ] Statutory waiting period satisfied (e.g., Cal. Fam. Code § 1615(c): seven days)
  • [ ] Signed ≥ 30 days before the wedding; not at the venue
  • [ ] No written or spoken conditioning of the wedding on signature
  • [ ] Dated timeline of drafts, redlines, and transmissions preserved

Disclosure

  • [ ] Schedule A and Schedule B complete: assets, liabilities, income
  • [ ] Backup attached: tax returns, statements, capitalization summary, valuations
  • [ ] Every page of the schedules initialed by both parties
  • [ ] Disclosure acknowledgment recital included
  • [ ] No disclosure waiver relied upon

Substance — permitted

  • [ ] Separate and marital property defined
  • [ ] Tracing, commingling, and transmutation addressed
  • [ ] Passive and active appreciation addressed explicitly
  • [ ] Debt allocation addressed
  • [ ] Business interests, equity, options, RSUs, SAFEs addressed by name
  • [ ] IP and royalty streams addressed
  • [ ] Marital residence addressed
  • [ ] Spousal support: waived, capped, or formula — with a public-assistance floor
  • [ ] Estate rights waived (elective share, homestead, exempt property, family allowance)
  • [ ] Life insurance and beneficiary covenants included
  • [ ] Attorney's fees; confidentiality; dispute resolution

Substance — prohibited

  • [ ] No child support waiver or cap
  • [ ] No custody or parenting-time terms
  • [ ] No unconscionable terms
  • [ ] No lifestyle / infidelity / liquidated-damages-for-misconduct clauses
  • [ ] No purported ERISA plan waiver
  • [ ] Severability clause included

Fairness architecture

  • [ ] Sunset clause and/or step-down schedule
  • [ ] Child-birth / career-sacrifice trigger
  • [ ] Liquidity-event participation, if applicable
  • [ ] Triggers drafted with objective conditions and a worked math exhibit

Choice of law and forum

  • [ ] Choice-of-law clause with a substantial relationship to the parties
  • [ ] Forum / ADR provisions consistent with state law
  • [ ] Mobility clause included
  • [ ] Agreement drafted to satisfy the strictest plausible standard

Execution and after

  • [ ] Writing, signed by both parties, every page initialed
  • [ ] Notarized / acknowledged as the state requires
  • [ ] Certificates of independent review appended
  • [ ] Complete conformed copies (with schedules) to both parties
  • [ ] ERISA spousal consents executed after the marriage
  • [ ] Beneficiary designations and estate plan conformed
  • [ ] Review calendared every 3–5 years and at each major life event

Primary Authority

Uniform acts

  • Uniform Premarital Agreement Act (UPAA) (1983) — § 2 (writing; signed; enforceable without consideration), § 3 (permitted content, including choice of law; child support may not be adversely affected), § 4 (effective on marriage), § 6 (enforcement: involuntariness; unconscionability plus inadequate disclosure; public-assistance override), § 8 (limitation of actions tolled during marriage). Adopted, with state-specific variations, in roughly half the states. Read your state's enacted version, not the uniform text.
  • Uniform Premarital and Marital Agreements Act (UPMAA) (2012) — consolidates premarital and marital agreements; conditions enforcement on voluntariness and absence of duress, access to independent legal representation, plain-language notice of waived rights where representation is waived, and adequate financial disclosure. Adopted in a small number of states, including Colorado and North Dakota.
  • Uniform Probate Code § 2-213 — waiver of the elective share, homestead allowance, exempt property, and family allowance by written contract, before or after marriage, in states that have adopted the UPC.

Doctrine: unconscionability and the "second look"

  • The central variable across states is when fairness is measured. Under the UPAA, unconscionability is measured at execution and is a defense only when paired with a disclosure failure (§ 6(a)(2)). A minority of states also take a "second look" at conscionability at the time of enforcement. There is no national rule; identify your state's answer before drafting.

Representative state statutes (examples, not a survey)

  • Cal. Fam. Code §§ 1610–1617 (California Premarital Agreement Act), including § 1612(c) (spousal-support provision unenforceable if the party against whom enforcement is sought was not represented by independent counsel at signing; and unenforceable if unconscionable at the time of enforcement) and § 1615(c) (voluntariness requirements, including the seven-day rule between presentation and signing).
  • Cal. Fam. Code § 852 (transmutation of property requires an express declaration in writing).
  • N.Y. Dom. Rel. Law § 236(B)(3) (premarital and marital agreements must be in writing, subscribed by the parties, and acknowledged in the manner required to entitle a deed to be recorded).
  • Conn. Gen. Stat. § 46b-36g (agreement unenforceable if unconscionable when executed or when enforcement is sought — a "second look" statute).
  • N.J. Stat. Ann. § 37:2-38 (as amended in 2013, fixing the unconscionability inquiry at the time of execution).

Cases

Federal overlay

  • ERISA § 205, 29 U.S.C. § 1055 — spousal consent required to waive a qualified joint and survivor annuity or a qualified preretirement survivor annuity. A premarital agreement is not a spousal consent, because the signer is not yet a spouse; see 26 C.F.R. § 1.401(a)-20, Q&A-28. Execute plan consents after the marriage.
  • 17 U.S.C. §§ 203, 304(c) — copyright termination rights vest in a statutory class of successors and cannot be contracted away in advance, which constrains what a prenup can do with a creator's copyrights.

Secondary Sources

  • Restatement (Second) of Contracts §§ 175–176 (duress by threat; when a threat is improper) and § 208 (unconscionable contract or term) — the general contract-law backbone that state marital-agreement doctrine draws on and modifies.
  • Restatement (Second) of Conflict of Laws §§ 187–188 (party choice of law; the substantial-relationship requirement and the fundamental-public-policy limit).
  • Restatement (Third) of Property: Wills and Other Donative Transfers (contractual waiver of marital rights at death).
  • Standard family-law and contracts treatises (e.g., Corbin and Williston on Contracts for duress and unconscionability) and your state's practice manuals, which are usually the fastest route to the local rule.

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This checklist is general legal information from UpLaw (uplaw.us), not legal advice, and does not create an attorney-client relationship. Premarital agreement law is state-specific and changes over time; verify current requirements in your jurisdiction and consult qualified family-law counsel before drafting, signing, or challenging a prenuptial agreement.